1. I might show a little diagram somewhere in the future. The difference for the characters is their type of weapon and magic, dagger/fire, axe/earth, sword/ice.

2. Starting with full magic would probably make it too easy, and I think it's more fun to start slow and then get your super powers later.

3. Although the enemy spellcasters can cast infinitely, they cannot actually attack you from maximum range (they use the same distance check as weapon users) and their magic will be canceled if they get hit, unlike yours. And besides that, you're a human and you have the advantage of superior intelligence and determination.